This came up with the need of having the arduino permanently installed on the robots, I´m tired of having to remove the arduino from one bot to the other, and then rewire everything, and then reupload the code everytime I have a new idea, or everytime I want to show the bot to someone.
So I followed the ITP Physical Computing tutorial, and it works like a charm, now I want to try to upload code with the FTDI cable, and If I have success on this I can start making my custom Arduino boards. :D
The link below might be of interest:
Burning the bootloader without an external AVR-Writer
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Update: 18.03.09
And here´s the trick to upload code without having to remove the chip to a normal Arduino board, and then put it back on the breadboard, I´m using an FTDI cable, Black and Red connect to GND and +V, he RX from the FTDI cable goes to the AVR’s TX (pin3) and the FTDI’s TX goes to AVR’s RX (pin2).
“I hold down the reset button, press the upload button, count to three, then release the reset button. Then the IDE seems to upload the smoothest.” Full credits to Rudolph for sharing the trick.
Another mighty trick is using a 0.01 uf cap between the RTS (green wire) and reset pin, it will make an auto reset before uploading!!! I´ve made my day!! :D Thank you Rory ;)
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Testing the circuit with the L293D :-)